Greco Nancy, Cluigt Nicolás, Cline Andrew, Liljesthröm Gerardo
Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Facultad de Ciencias Naturales y Museo, UNLP, CONICET, La Plata, Argentina.
Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, La Plata, Argentina.
PLoS One. 2017 Jul 11;12(7):e0180093. doi: 10.1371/journal.pone.0180093. eCollection 2017.
Lobiopa insularis is a newly reported pest of strawberry in Argentina. We investigated characteristics of its biology in the laboratory, including survivorship and reproduction. We also estimated population growth for L. insularis fed ripe strawberry fruits. Lobiopa insularis was not observed ovipositing on strawberry fruits. A higher proportion of egg masses were recorded from a depth of 1 cm within the soil than on either the soil surface or deeper than 1cm (i.e. between 1and 2 cm) within the soil. The duration of preimaginal developmental stages represented ~18.5% of the total life cycle, while the adult stage represented 81.5%. Survival from egg to adult was 64.20% and mean longevity of females and males adults was 121.84, (SE = 8.86) and 118.58 (SE = 5.90) days, respectively. Females laid eggs only when they were with a male, so reproductive period was dependent on male presence. The number of eggs/female/day was 18.01 (SE = 1.71); and total fecundity was 1655 (ES = 249.53) eggs/female. The long life span of adults and high reproductive output, i.e high fecundity and long reproductive period, indicate that availability and concentration of suitable developmental resources are important factors in the population dynamics of Lobiopa insularis associated with strawberry crops.
海岛叶甲是阿根廷新报道的草莓害虫。我们在实验室研究了其生物学特性，包括存活率和繁殖情况。我们还估算了取食成熟草莓果实的海岛叶甲的种群增长情况。未观察到海岛叶甲在草莓果实上产卵。在土壤中1厘米深处记录到的卵块比例高于土壤表面或土壤中1厘米以下（即1至2厘米之间）的深度。幼虫发育阶段的持续时间约占总生命周期的18.5%，而成虫阶段占81.5%。从卵到成虫的存活率为64.20%，雌成虫和雄成虫的平均寿命分别为121.84（标准误 = 8.86）天和118.58（标准误 = 5.90）天。雌虫仅在有雄虫陪伴时才产卵，因此繁殖期取决于雄虫的存在。每雌虫每天产卵数为18.01（标准误 = 1.71）；总繁殖力为每雌虫1655（标准误 = 249.53）粒卵。成虫的长寿命和高繁殖产出，即高繁殖力和长繁殖期，表明合适的发育资源的可获得性和浓度是与草莓作物相关的海岛叶甲种群动态的重要因素。
